i = I sometimes feel down.
when i = I  feel down , vi = I  read a book and then interesting book encourages me,
wehn i = When I play the piano, my mental feel = mentality feels so happy,
when I take a walk in the park and eat delious food. I feel so good.

todays i = Today, I  have a positive spirit.
so i am very happy.

its a shame that my body is getting older, but I want to grow my mind indefinitely.

That's very wonderful. Thank you for sharing, Byouncchul.